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xo-unit: refactor: move promoter aux class to detail/ subdir

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This commit is contained in:
Roland Conybeare 2024-04-05 02:00:05 -04:00
commit eea10d8fe1
2 changed files with 47 additions and 22 deletions
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40
include/xo/unit/detail/promoter.hpp Normal file
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@ -0,0 +1,40 @@
/** @file promoter.hpp
*
* Author: Roland Conybeare
**/
#pragma once
#include "unit.hpp"
namespace xo {
namespace unit {
/** @class promoter
*
* Auxiliary class driver for quantity::promote().
* promoter has two specializations:
* 1. if Unit is dimensionless, @c promoter::promote() is the identity function.
* This has the effect of collapsing dimensionless quantities to their representation.
* 2. if Unit has at least one non-empty dimension,
* @c promoter::promote() builds an xo::unit::quantity instance
**/
template <typename Unit, typename Repr, bool Dimensionless = dimensionless_v<Unit> >
struct promoter;
template <typename Unit, typename Repr>
class quantity;
/* collapse dimensionless quantity to its repr_type> */
template <typename Unit, typename Repr>
struct promoter<Unit, Repr, /*Dimensionless*/ true> {
static constexpr Repr promote(Repr x) { return x; };
};
template <typename Unit, typename Repr>
struct promoter<Unit, Repr, /*Dimensionless*/ false> {
static constexpr quantity<Unit, Repr> promote(Repr x) { return quantity<Unit, Repr>(x); }
};
} /*namespace unit*/
} /*namespace xo*/
/** end promoter.hpp **/

29
include/xo/unit/quantity.hpp
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@ -4,18 +4,12 @@
#include "quantity_concept.hpp"
#include "unit.hpp"
#include "detail/promoter.hpp"
//#include "xo/reflect/Reflect.hpp"
//#include "xo/indentlog/scope.hpp"
namespace xo {
namespace unit {
/** @class promoter
*
* Aux class assister for quantity::promote()
**/
template <typename Unit, typename Repr, bool Dimensionless = dimensionless_v<Unit> >
struct promoter;
// ----- quantity -----
/** @class quantity
@ -72,10 +66,7 @@ namespace xo {
static constexpr quantity unit_quantity() { return quantity(1); }
/** @brief promote representation to quantity. Same as multiplying by Unit
**/
static constexpr auto promote(Repr x) {
//std::cerr << "quantity<U,R>::promote: x=" << x << ", R=" << reflect::Reflect::require<Repr>()->canonical_name() << std::endl;
return promoter<Unit, Repr>::promote(x);
}
static constexpr auto promote(Repr x);
///@}
/** @addtogroup quantity-traits **/
@ -500,18 +491,12 @@ namespace xo {
Repr scale_ = 0;
}; /*quantity*/
// ----- promoter -----
/* collapse dimensionless quantity to its repr_type> */
template <typename Unit, typename Repr>
struct promoter<Unit, Repr, /*Dimensionless*/ true> {
static constexpr Repr promote(Repr x) { return x; };
};
template <typename Unit, typename Repr>
struct promoter<Unit, Repr, /*Dimensionless*/ false> {
static constexpr quantity<Unit, Repr> promote(Repr x) { return quantity<Unit, Repr>(x); }
};
constexpr auto
quantity<Unit, Repr>::promote(Repr x) {
//std::cerr << "quantity<U,R>::promote: x=" << x << ", R=" << reflect::Reflect::require<Repr>()->canonical_name() << std::endl;
return promoter<Unit, Repr>::promote(x);
}
// ----- operator+ -----